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  1. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    Thanks for your advice! I checked the spark plugs and they’re all tight. Checked with a stethoscope and it’s not sounding like an exhaust leak. Took the belt off and the sound was still there. I have to work all weekend so I won’t get a chance to look at it again until Monday unfortunately.
  2. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    Also the AFM system isn’t active. I should have mentioned that. I noticed when I bought it that it stays in V8 mode all the time.
  3. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    I pulled the spark plug from that cylinder today actually. It was in pretty tight.
  4. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    I went out and got a mechanics stethoscope and I’ve narrowed down where the noise is coming from I think. I can hear it best on the front of the oil pan and on a the block right where the head is bolted on on the driver side. It’s clearer on the block where it meets the head. I took a picture of...
  5. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    I use 5w30 Mobil One synthetic with an ACDelco filter. Here are some pictures of the driver side. I didn’t stop to take pictures of the passenger but everything looked the same as far as color and buildup.
  6. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    Took off the passenger side valve cover and did the same thing. Everything looks okay nothings loose and everything is moving as it should. I’m really not sure what to look for from here.
  7. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    Took the valve cover off tonight. None of the rockers feel loose at all. Turned the engine over manually and couldn’t find any slack or movement anywhere in the rockers that way. Turned the engine over with the key to verify all the rockers are moving. I’m open to any other ideas.
  8. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    What should I look for once I get the valve cover off?
  9. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    No misfires codes. Engines seems to run smooth.
  10. 12XLYukon

    2012 Yukon 6.2 Engine Noise

    Hi all, I just recently bought a 2012 Yukon XL Denali with the 6.2. It has developed a noise that I can’t identify. It has 214k on the miles. Noise is coming from driver side and can be heard from under the hood and in the wheel well. Louder on cold start but still present after driving. No...

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